JP4461896B2 - In-vehicle device remote control device and portable device - Google Patents

Description

  The present invention relates to an in-vehicle device remote control device and a portable device, and more particularly to an in-vehicle device remote control device and a portable device that remotely control the in-vehicle device by the portable device.

  In recent years, the operation of locking and unlocking a vehicle door has been mainly performed by a keyless entry system or a smart key system using a portable device. As a result, the opportunity to operate the lock / unlock of the vehicle door by a mechanical operation of inserting a mechanical key (hereinafter referred to as a mechanical key) into the key cylinder and rotating the mechanical key is reduced.

  Also, immobilizers are becoming popular in the operation of starting the engine of a vehicle from the viewpoint of preventing theft. The immobilizer performs electrical ID verification (authentication) with the encryption chip of the mechanical key, and if the verification result is not correct, it does not supply fuel or electricity to the engine even if the mechanical key groove matches. Starting is prohibited. As described above, in the operation of locking and unlocking the vehicle door and the operation of starting the engine, the verification result of electrical ID verification is used, and the meaning of having a mechanical key is weakened.

  Further, in the smart key system, bidirectional ID verification is performed between the portable device carried by the user and the vehicle, and the operation of locking and unlocking the vehicle door and the operation of starting the engine are electrically performed. In general operations such as a vehicle door lock / unlock operation and an engine start operation, the user need not take out the portable device. Further, no mechanical key is required in general operations such as a vehicle door lock / unlock operation and an engine start operation.

  However, since electric ID verification requires electric power, when the vehicle battery has run out, general operations such as the operation of locking and unlocking the vehicle door and the operation of starting the engine are electrically performed. It becomes impossible to do.

For example, Patent Document 1 describes an in-vehicle device remote control device that includes a sub-battery and performs ID verification using the sub-battery and operates lock / unlock of a vehicle door when the main battery of the vehicle has run out. ing. Patent Document 2 describes a lock device that releases a steering lock with a mechanical key when a battery of a vehicle has run out.
Japanese Patent Laid-Open No. 11-117586 JP 2000-352237 A

  The in-vehicle device remote control device of Patent Document 1 needs to include a sub-battery only for operating the lock / unlock of the vehicle door. In addition, the in-vehicle device remote control device of Patent Document 1 is effective when the main battery is temporarily raised due to forgetting to turn off the light, etc., but for a certain reason (long-term business trip etc.) If the vehicle is not operated, the sub-battery that is not normally loaded may naturally discharge. As described above, in the in-vehicle device remote control device of Patent Document 1, when the main battery and the sub battery are raised, there is a problem that the operation of locking and unlocking the vehicle door cannot be performed electrically. It was.

  Therefore, when general operations such as the operation of locking and unlocking the vehicle door and the operation of starting the engine cannot be performed electrically, the vehicle door is unlocked with the mechanical key and the switch in the vehicle interior is operated. Then I had to open the hood and recharge or replace the battery.

  Eventually, the user had to carry a mechanical key in case the battery would run out. Since the mechanical key has a certain size and weight, convenience is improved when it is not necessary to carry it.

  The present invention has been made in view of the above points, and an object of the present invention is to provide an in-vehicle device remote control device and a portable device that can reliably control the driving of the in-vehicle device.

  Therefore, in order to solve the above-described problem, the present invention provides a power receiving unit that receives power from a portable device, a signal matching unit that transmits and receives signals to and from the portable device, and a first unit that charges power. 1 charge storage means, charging control means for controlling charging of the power received by the power receiving means based on the collation result, and drive control means for driving the in-vehicle device with the charged charging power. It is characterized by.

  In the in-vehicle device remote control device of the present invention, collation with a portable device is performed, and charging by electric power supplied from the portable device is controlled based on the collation result. The in-vehicle device remote control device can reliably operate the in-vehicle device by charging the power supplied from the portable device and driving the in-vehicle device with the charged power.

  For example, even if the vehicle battery remote control device of the present invention is powered up, power is supplied from the outside of the vehicle, so that the power can be charged and used to drive the vehicle equipment. In addition, the in-vehicle device remote control device of the present invention collates with a portable device and controls the charging of power based on the collation result, so that charging of power is performed when power is supplied by a legitimate user. Is possible.

  It further has a 2nd charge storage means which charges electric power with the 2nd power supply voltage smaller than the 1st power supply voltage which drives the in-vehicle device, and the charge electric power charged in the 2nd charge storage means is the above-mentioned You may make it perform collation. In the vehicle-mounted device remote control device according to the present invention, the signal verification unit is disconnected from the first power supply voltage system that drives the vehicle-mounted device, and the signal verification unit is driven with a second power supply voltage that is smaller than the first power supply voltage. Therefore, the signal verification means can be driven with a low voltage and a low current. That is, the time required to charge the electric power necessary to drive the signal verification unit is shorter than the configuration in which the signal verification unit is driven by the first power supply voltage. As a result, the vehicle-mounted device remote control device of the present invention can be verified with a shorter charge than the configuration in which the signal verification means is driven by the first power supply voltage.

  It is preferable that the signal checking means and the charging control means are grounded so that the ground potential is the same not only in a direct current but also in an alternating current. In the in-vehicle device remote control device of the present invention, since charging of electric power is controlled based on the result of verification by the signal verification unit, the ground potential is made the same even in an alternating manner, and malfunction due to the influence of an external magnetic field or the like is suppressed. be able to.

  The power receiving means may receive power by electromagnetic induction by electromagnetic waves transmitted from the portable device. In the in-vehicle device remote control device of the present invention, electric power can be received from a portable device by electromagnetic induction without providing a direct electrical contact with the vehicle.

  The electromagnetic wave transmitted from the portable device may include a verification signal. In the in-vehicle device remote control device of the present invention, a verification signal can be transmitted to and received from a portable device using electromagnetic waves.

  When the signal matching unit receives power from the portable device, the signal matching unit transmits a reply request signal (challenge signal) to the portable device, and based on a reply signal (response signal) transmitted from the portable device in response to the reply request signal You may make it perform collation. In the in-vehicle device remote control device of the present invention, when power is received from the portable device, a reply request signal (challenge code S14) is transmitted to the portable device, and collation is performed based on the reply signal (response code S16) to the reply request signal. Therefore, it can be determined whether or not the user supplying power is a valid user.

  The signal verification unit may permit the charge control unit to start charging and notify the portable device of the start of charging when the verification result is correct. Since the vehicle-mounted device remote control device of the present invention is configured to start charging when the collation result is correct, the power can be charged when the user supplying power is a valid user. In addition, since the portable device is notified of the start of charging, transmission of power can be stopped when the start of charging is not notified. As a result, the in-vehicle device remote control device according to the present invention can suppress useless charging and prevent wasteful consumption of power of the portable device.

  When the charging state of the first charge storage means for charging power with the first power supply voltage for driving the in-vehicle device is detected and a predetermined charging state is detected, the in-vehicle device is driven with respect to the drive control means. You may further have the power supply monitoring means to permit. In the vehicle-mounted device remote control device of the present invention, the vehicle-mounted device can be driven after the charging state sufficient to drive the vehicle-mounted device is detected by detecting the charging state of the charging power that drives the vehicle-mounted device. As a result, since the vehicle-mounted device remote control device of the present invention is energized in a state of charge sufficient to drive the vehicle-mounted device, it is possible to prevent wasteful consumption of charging power and to prevent excessive charging. .

  There may be further provided temperature detection means for detecting the environmental temperature, and the drive control means may change the charging power for driving the in-vehicle device based on the environmental temperature. The vehicle-mounted device remote control device according to the present invention addresses the fact that the state of charge sufficient to drive the vehicle-mounted device changes according to the environmental temperature. For example, the charging power required to drive an in-vehicle device is larger at a low temperature than at a normal temperature. In the in-vehicle device remote control device of the present invention, the charging control means changes the charging power for driving the in-vehicle device based on the environmental temperature, thereby preventing excessive charging and charging state sufficient for driving the in-vehicle device. After that, the in-vehicle device can be driven reliably.

  You may further have a notification means showing charging the electric power which the said electric power receiving means received based on the said collation result. In the in-vehicle device remote control device of the present invention, it is possible to notify the user that power is being charged. Since the user can confirm that the electric power transmitted from the portable device is charged, the charging operation can be continued with peace of mind. Note that the notification means includes an indicator or the like.

  The present invention also relates to a portable device that transmits electric power to a vehicle and remotely controls driving of the on-vehicle equipment of the vehicle by using the electric power, and between the electric power transmitting means for transmitting electric power to the vehicle and the vehicle Signal transmitting and receiving means for transmitting and receiving a signal and performing verification, and control means for continuing the transmission of the power when the verification result is correct and stopping the transmission of the power when the verification result is incorrect. The vehicle-mounted device of the vehicle is driven by the charging power charged with the power.

  In the portable device of the present invention, it is possible to collate with the vehicle and continue or stop transmission of power supplied to the vehicle based on the collation result. The portable device transmits power to the vehicle and can reliably drive the on-vehicle device with the charged power. In addition to the keyless entry system and the smart key system, the portable device can use a portable phone, a simple portable phone, a portable information terminal, and the like.

  When the collation result is correct, the information processing apparatus may further include notification means for indicating that the vehicle is being charged with electric power. In the portable device of the present invention, the user can be notified that power is being charged in the vehicle. Since the user can confirm that the power transmitted from the portable device is being charged, the charging operation can be continued with peace of mind. Note that the notification means includes an indicator or the like.

  ADVANTAGE OF THE INVENTION According to this invention, the vehicle-mounted apparatus remote control apparatus and portable device which can carry out the remote control of the drive of vehicle-mounted apparatus reliably can be provided.

  Next, the best mode for carrying out the present invention will be described based on the following embodiments with reference to the drawings. In this embodiment, the door lock device is described as an example of the in-vehicle device. However, any in-vehicle device driven by charging power may be used. Moreover, if it is an apparatus driven with charging power, it will not be restricted to an in-vehicle apparatus.

  FIG. 1 is a configuration diagram of an example of an in-vehicle device remote control system according to the present invention. Antenna coil 10, ID collating unit 11, charge accumulating unit 12 as second charge accumulating unit, charge control switch circuit 13, boosting unit 14, and charge accumulating unit 15 as first charge accumulating unit The power supply monitoring unit 16, the drive control switch circuit 17, the door lock motor 18, and the notification unit 19 are provided in the vehicle 2.

  The antenna coil 10 receives electromagnetic waves from the portable device 1 and receives power by electromagnetic induction. The antenna coil 10 charges the charge storage unit 12 with the received power for the purpose of operating the ID verification unit 11. In general, the vehicle 2 has a higher power supply voltage (hereinafter referred to as a 12V power supply voltage as an example) in order to drive on-vehicle equipment such as the door lock motor 18. Therefore, when electric charges are stored with a 12V power supply voltage, it is necessary to supply a large amount of power from the portable device 1.

  Therefore, in the present invention, the ID verification unit 11, the charging control switch circuit 13, and the notification unit 19 are separated from the 12V system power supply voltage, and the power supply voltage lower than the 12V system power supply voltage (hereinafter, as an example, the 3V system power supply voltage). And so on). Therefore, the ID verification unit 11, the charging control switch circuit 13, and the notification unit 19 can be driven with a low voltage and a low current. In other words, the time required to charge the power necessary to drive the ID verification unit 11 is shorter than charging the 12V system power supply voltage. As a result, the ID collating unit 11 can collate with a shorter charging time than a configuration driven by a 12V power supply voltage.

  The charge storage unit 12 performs charging with a 3V power supply voltage. The ID verification unit 11 operates with the charging power charged in the charge storage unit 12. As will be described later, the ID verification unit 11 transmits and receives signals to and from the portable device 1 to perform ID verification, and determines whether or not the user who is supplying power is a valid user.

  When it is confirmed that the user supplying the power is a valid user, the ID verification unit 11 is open so that the charge storage unit 15 is not charged with a 12V power supply voltage until then. 13 is controlled to close. When the charging control switch circuit 13 is closed, the electric power received by the antenna coil 10 is boosted by the boosting unit 14 as necessary and charged in the charge storage unit 15. The charge storage unit 15 starts charging with a 12V power supply voltage in order to drive the door lock motor 18. As described above, since the charging of the charge storage unit 15 is started with the 12V power supply voltage after determining the validity of the user, useless charging can be suppressed.

  In addition, the ID collation part 11 will perform the process for notifying a user that electric power is charged using the notification part 19, if the charge storage part 15 starts charge. The notification unit 19 includes an indicator and the like.

  The power supply monitoring unit 16 monitors the charging power of the charge storage unit 15, and when detecting that sufficient power has been charged to drive the door lock motor 18, the drive control switch circuit that has been open until then. 17 is controlled to close. Therefore, the door lock motor 18 is reliably driven by the charging power charged in the charge storage unit 15.

  FIG. 2 is a flowchart showing an outline of processing of the in-vehicle device remote control system. The in-vehicle device remote control system waits until power is supplied from the portable device 1 to the antenna coil 10 (NO in S1). If power is supplied to the antenna coil 10 (YES in S1), the ID collation unit 11 waits for the electric power necessary for driving to be charged in the charge storage unit 12, and proceeds to step S2.

  In step S2, the ID verification unit 11 transmits and receives signals to and from the portable device 1 to perform ID verification as will be described later. Proceeding to step S3, if the ID collation is correct (YES in S3), the ID collating unit 11 determines that the user supplying power is a valid user, and proceeds to step S4.

  In step S <b> 4, charging to the charge storage unit 15 is started by controlling the ID verification unit 11 to close the charging control switch circuit 13. Proceeding to step S5, the power supply monitoring unit 16 waits until sufficient electric power is stored in the charge storage unit 15 to drive the door lock motor 18 (NO in S5). When the charge storage unit 15 is charged with sufficient power to drive the door lock motor 18 (YES in S5), the power supply monitoring unit 16 proceeds to step S6 and controls the drive control switch circuit 17 to close. Then, the door lock motor 18 is driven. If the ID verification is not correct (NO in S3), the ID verification unit 11 ends the process without starting charging the charge storage unit 15.

  As described above, the in-vehicle device remote control system of the present invention supplies power from the portable device 1 when the battery of the vehicle has run out, and only when it is determined that the user is a valid user by ID authentication. The door lock motor 18 can be driven after the electric power for driving 18 is charged and sufficient electric power is charged.

  Details of the in-vehicle device remote control system shown in FIG. 1 will be described below. First, a mechanism for preventing malfunction of the charge control switch circuit 13 will be described with reference to FIG.

  For example, when the ID verification unit 11 and the charge control switch circuit 13 are grounded to different grounds in an alternating manner and are on different boards, the ID verification unit 11 and the charge control switch circuit 13 are vehicles. Connected with a wire harness. The ID verification unit 11 controls the opening and closing of the charging control switch circuit 13 by supplying a charging start control signal to the charging control switch circuit 13 via the vehicle wire harness.

  Here, it is assumed that a strong electromagnetic wave is input to the antenna coil 10. The strong electromagnetic wave input to the antenna coil 10 is also input to the ID collating unit 11 and the vehicle wire harness as the charge start control signal line, and the AC signal of the strong electric field is also superimposed on the charge start control signal. For example, the relationship between the charge start control signal, the ground potential, and the high signal threshold is as shown by a graph 21 in FIG.

  As a result, the charge control switch circuit 13 is closed due to a malfunction even though the ID verification unit 11 does not supply a charge start control signal for closing the charge control switch circuit 13. This malfunction is due to the fact that the ground potentials of the ID verification unit 11 and the charging control switch circuit 13 are not the same in terms of alternating current.

  Therefore, the ID verification unit 11 and the charging control switch circuit 13 in FIG. 1 are grounded so that the ground potential is the same in both direct and alternating current. If the ground potential of the ID verification unit 11 and the charge control switch circuit 13 are the same, the charge start control signal, the ground potential, and the high signal threshold swing in the same manner even when a strong electric field AC signal is input. The malfunction of the charge control switch circuit 13 can be prevented.

  Next, a communication sequence performed between the portable device 1 and the vehicle 2 will be described. FIG. 4 is an example of a communication sequence performed between the portable device and the vehicle. First, the user inputs a trigger such as pressing the start switch of the portable device 1. In step S11, the portable device 1 transmits an electromagnetic wave as shown in FIG.

  FIG. 5 is an image diagram of an example of an electromagnetic wave transmitted from the portable device 1. The electromagnetic wave transmitted from the portable device 1 includes a burst (continuous) wave and a wakeup code. The electromagnetic wave uses, for example, a frequency of several hundred kHz as a carrier, and a wake-up code represented by a 4-bit (for example, 1001) ASK signal is included between burst waves.

  When the antenna coil 10 receives electromagnetic waves, the charge storage unit 12 charges power with a burst wave. After waiting for the electric power necessary for driving the ID collating unit 11 to be charged in the charge accumulating unit 12, the process proceeds to step S12. The ID collating unit 11 determines whether or not the received electromagnetic wave includes a predetermined wakeup code (for example, 1001). If the wakeup code is not included (NO in S12), the process is terminated. .

  If the wake-up code is included (YES in S12), the ID collation unit 11 proceeds to step S13, and the entire ID collation unit 11 is activated by the wake-up circuit. That is, the ID verification unit 11 is configured to start ID verification only when a wake-up code is included, thereby preventing unnecessary operation (for example, malfunction due to external noise).

  In step S <b> 14, the ID verification unit 11 transmits a random code for ID verification (for example, a 32-bit challenge code) to the portable device 1. Proceeding to step S15, the portable device 1 that has received the random code for ID collation performs cryptographic computation using the cryptographic key algorithm f (x) using the cryptographic key. The encryption key is different for each vehicle. In step S16, the portable device 1 transmits the numerical value after the cryptographic operation as a response code.

  In step S17, the ID verification unit 11 determines whether the received response code is correct. That is, the ID verification unit 11 determines whether or not the received response code is a correct cryptographic calculation result by the cryptographic calculation algorithm f (x). If ID collation unit 11 determines that the received response code is correct (YES in S17), it proceeds to step S18 and transmits an ACK signal. On the other hand, if the ID verification unit 11 determines that the received response code is not correct (NO in S17), the process ends.

  After transmitting the response code in step S16, the portable device 1 proceeds to step S19, and determines whether or not an ACK signal is received within a predetermined time. If the ACK signal is received within the predetermined time (YES in S19), portable device 1 proceeds to step S20 and continues to transmit electromagnetic waves. On the other hand, if the ACK signal is not received within the predetermined time (NO in S19), the portable device 1 proceeds to step S21 and stops transmitting electromagnetic waves.

  Thus, since ID collation is performed between the portable device 1 and the vehicle 2 and the transmission of the electromagnetic wave from the portable device 1 is continued when the collation result is correct, the power from the limited battery of the portable device 1 is obtained. Can be prevented from continuing to be wasted.

  Next, a process for notifying the user that power is charged will be described. For example, after the charge control switch circuit 13 is closed and charging of the charge storage unit 15 is started with a 12 V system power supply voltage, the portable device 1 starts to charge enough power to drive the door lock motor 18. If it continues transmitting electromagnetic waves, it will be in a good state. However, since the transmission amount (transmission efficiency) changes depending on the output power difference of the portable device 1, the positional relationship between the portable device 1 and the vehicle 2, the distance, and the like, the required charging time changes even in the same combination. Therefore, when the charging control switch circuit 13 is closed and charging of the 12V system power supply voltage is started, the ID verification unit 11 notifies the user that charging is being performed using the notification unit 19. Since the user can confirm that charging is in progress, the user can continue to transmit electromagnetic waves from the portable device 1 with peace of mind.

  In the vehicle 2, it is desirable to reduce power consumption as much as possible in the process of charging power. Therefore, it is conceivable that the notification unit 19 is composed of a low power consumption LED. If the notification part 19 is comprised with LED, it can be made to light with low power consumption, the user can confirm that it is charging continuously, and there is a sense of security. The notification unit 19 may be configured with a speaker or the like.

  Moreover, you may make it provide the structure for notifying a user that electric power is charged in the portable device 1. FIG. 6 is a configuration diagram of an example of a portable device according to the present invention. The portable device 1 includes an antenna 21, a transmission / reception circuit 22, an ECU 23, a memory 24, a notification unit 25, and a battery 26.

  An antenna 21 that transmits and receives electromagnetic waves to and from the vehicle 2 is connected to the ECU 23 via a transmission / reception circuit 22. The ECU 23 is connected to a memory 24, a notification unit 25, and a battery 26. The memory 24 includes an EEPROM that stores an encryption key, a wakeup code, and the like. The portable device 1 operates using the power of the battery 26. The portable device 1 transmits electromagnetic waves using the power of the battery 26.

  When the notification unit 25 receives the ACK signal from the antenna 21, the notification unit 25 notifies the user that charging is in progress. 6 can use a mobile phone, a simple mobile phone, a portable information terminal, and the like in addition to a keyless entry system or a smart key system.

  Next, a mechanism for detecting that sufficient electric power for driving the door lock motor 18 is charged in the charge storage unit 15 will be described. FIG. 7 is a diagram for explaining a mechanism for detecting that sufficient electric power for driving the door lock motor 18 is charged in the charge storage unit 15.

  When the ID collation unit 11 performs control so as to close the charge control switch circuit 13, charging of the charge storage unit 15 is started. If the voltage is low to charge with a 12V power supply voltage, the voltage is boosted by the booster 14. The step-up unit 14 is configured by a DC-DC converter, a voltage conversion transformer, or the like. The charge storage unit 15 is composed of a secondary battery, a capacitor, or the like.

  By the way, if the electric power is supplied before the electric power sufficient to drive the door lock motor 18 is charged, the operation of the door lock motor 18 cannot be obtained, and the position of the door lock does not reverse from the locked state to the unlocked state. Furthermore, since all the electric power charged in the charge storage unit 15 is discharged, it is necessary to perform charging again.

  Therefore, the power supply monitoring unit 16 monitors the charging power charged in the charge storage unit 15, and when detecting that sufficient power has been charged to drive the door lock motor 18, the power control unit 16 has been open until then. The switch circuit 17 is controlled to close. That is, the power supply monitoring unit 16 operates the door lock motor after sufficient power is charged to drive the door lock motor. As a result, it is possible to prevent power from being consumed unnecessarily and charged excessively before the door lock motor 18 is charged, and to prevent excessive charging.

  The power supply monitoring unit 16 can be configured by a time constant circuit including a resistor R and a capacitor C. The resistor R ′ is inserted for the purpose of dividing the voltage to a voltage suitable for the comparator input voltage. Although the voltage V increases as the charging current is charged in the charge storage unit 15, by providing a time constant circuit, the comparator input voltage rises with a delay by the time constant as shown in FIG. FIG. 8 is a response waveform of an example of the charge storage unit voltage and the comparator input voltage. As shown in the response waveform of FIG. 8, the time until the voltage comparator input voltage is saturated can be delayed by a time constant Δt after the charge storage unit voltage is saturated. After the electric power storage unit 15 is charged with sufficient power to drive the door lock motor 18, the power supply monitoring unit 16 that controls the drive control switch circuit 17 that has been open until then is closed. Thus, it can be realized with a simple configuration.

  In the response waveform of FIG. 8, the voltage rise curve is a very smooth solid line curve, but no problem occurs even when ripples such as those indicated by the broken line exist. Since the time constant circuit output has a smooth waveform without ripples due to the LPF, the door lock motor 18 is energized after the electric charge storage unit 15 is charged with sufficient power to drive the door lock motor 18. it can.

  Next, a mechanism for changing the charging power for driving the door lock motor 18 based on the environmental temperature will be described. For example, when the door lock motor 18 is driven, it is generally difficult to obtain driving at a lower temperature than at a normal temperature. That is, in order to drive the door lock motor 18 reliably at a low temperature, a large amount of charging power is required. In addition, it is useless to secure the charging power necessary for driving the door lock motor 18 at a low temperature.

  Therefore, temperature detection means for detecting the environmental temperature is provided, and the charging power for driving the door lock motor 18 is changed based on the environmental temperature by adjusting the timing for closing the drive control switch circuit 17 according to the environmental temperature. The charging voltage charged in the charge storage unit 15 can be increased or decreased by changing the threshold voltage of the comparator 31 in FIG. 7 and adjusting the timing for closing the drive control switch circuit 17. Moreover, the threshold voltage of the comparator 31 can be changed based on the environmental temperature by applying an element (for example, a temperature sensitive resistor) whose resistance value varies with temperature as the resistors r1 and r2.

  Therefore, the charge power charged in the charge storage unit 15 can be increased at a low temperature and can be decreased at a normal temperature, and after the battery has been charged with sufficient power to prevent excessive charging and drive the door lock motor 18. Thus, the door lock motor 18 can be reliably driven.

  FIG. 9 is a diagram for explaining another mechanism for changing the charging power for driving the door lock motor 18 based on the environmental temperature. In FIG. 9, charge storage units 15-1 and 15-2 are provided. At room temperature, only the switch circuit 41 is closed, the electric charge storage unit 15-1 is charged with power, and the door lock motor 18 is driven. When the temperature is low, both the switch circuits 41 and 42 are closed, the electric power is charged in both the charge storage units 15-1 and 15-2, and the door lock motor 18 is driven.

  Accordingly, the charging power charged at normal temperature can be reduced and increased at low temperature, and after excessive charging at normal temperature and enough power to drive the door lock motor 18 at low temperature is charged. The door lock motor 18 can be driven reliably.

  The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above-described embodiments, and various modifications and substitutions can be made to the above-described embodiments without departing from the scope of the present invention. Can be added. The power receiving means described in the claims corresponds to the antenna coil 10, the signal verification means corresponds to the ID verification unit 11, the charge control means corresponds to the charge control switch circuit 13, and the drive control means Corresponding to the drive control switch circuit 17, the power monitoring means corresponds to the power monitoring section 16, the notification means corresponds to the notification sections 19 and 25, the power transmission means corresponds to the antenna 21, and the signal transmission / reception means corresponds to the transmission / reception circuit. The control means corresponds to the ECU 23.

It is a block diagram of an example of the vehicle equipment remote control system by this invention. It is a flowchart showing the process outline | summary of the vehicle equipment remote control system. It is a figure for demonstrating the mechanism which prevents the malfunctioning of the switch circuit for charge control. It is an example of a communication sequence performed between a portable machine and a vehicle. It is an image figure of an example of the electromagnetic waves transmitted from a portable machine. It is a block diagram of an example of the portable device by this invention. It is a figure for demonstrating the mechanism which detects that electric power sufficient to drive a door lock motor was charged by the electric charge storage part. It is a response waveform of an example of a charge storage part voltage and a comparator input voltage. It is a figure for demonstrating the other mechanism which changes the charging electric power which drives a door lock motor based on environmental temperature.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Portable machine 2 Vehicle 10 Antenna coil 11 ID collation part 12, 15 Charge storage part 13 Charge control switch circuit 14 Booster part 16 Power supply monitoring part 17 Drive control switch circuit 18 Door lock motor 19, 25 Notification part 21 Antenna 22 Transmission / reception Circuit 23 ECU
24 memory 26 battery

Claims (8)

Power receiving means for receiving power from the portable device;
First charge storage means for charging power for driving the in-vehicle device;
Drive control means for driving the in-vehicle device;
A second charge storage means that is charged by the power received by the power receiving means and charges the power with a power supply voltage lower than the power supply voltage of the first charge storage means;
Signal verification means for performing verification by transmitting and receiving signals to and from the portable device with the charging power charged in the second charge storage means;
If the ID verification of the signal verification unit is correct, the power reception unit and the second charge storage unit are connected to the first charge storage unit to charge the first charge storage unit, and the signal verification unit Charging control means for connecting the power receiving means and the second charge storage means to the first charge storage means if the ID verification is not correct;
A power supply monitoring means for detecting a charge state of the first charge storage means and permitting the drive control means to drive the in-vehicle device when a predetermined charge state is detected;
A vehicle-mounted device remote control device.   2. The in-vehicle device remote control device according to claim 1, wherein the signal matching unit and the charging control unit are grounded so that a ground potential is the same not only in a direct current but also in an alternating current.   The in-vehicle device remote control device according to claim 1, wherein the power receiving unit receives power by electromagnetic induction using electromagnetic waves transmitted from the portable device.   The in-vehicle device remote control device according to claim 3, wherein the electromagnetic wave transmitted from the portable device includes a verification signal.   When the signal matching unit receives power from the portable device, the signal matching unit transmits a reply request signal (challenge signal) to the portable device, and based on a reply signal (response signal) transmitted from the portable device in response to the reply request signal The in-vehicle device remote control device according to claim 1, wherein collation is performed.   6. The signal verification unit according to claim 1, wherein when the verification result is correct, the charging control unit permits the charging control unit to start charging and notifies the portable device of the start of charging. The in-vehicle device remote control device according to Item 1. The temperature detection means which detects environmental temperature is further provided, The said drive control means changes the charging electric power which drives a vehicle-mounted apparatus based on environmental temperature, The any one of Claim 1 thru | or 6 characterized by the above-mentioned. In-vehicle equipment remote control device. The in-vehicle device remote control according to any one of claims 1 to 7 , further comprising notification means for indicating that the power received by the power receiving means is being charged based on the collation result. apparatus.

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